10-29
[1]
VALVE LAPPER
(Commercially
available)
1.25 – 1.55 mm
(0.049 – 0.061 in)
• VALVE SEAT WIDTH
STANDARD
SERVICE LIMIT
IN/EX
1.25 – 1.55 mm
2.0 mm
(0.049 – 0.061 in)
(0.08 in)
5) Make a light pass with the 45˚ cutter to remove any possible
burrs at the edges of the seat.
6) After resurfacing the seats, inspect for even valve seating.
Apply Prussian Blue compound or erasable felt-tipped
marker ink to the valve faces. Insert the valves, and then lift
them and snap them closed against their seats several
times. Be sure the valve does not rotate on teh seat. The
seating surface, as shown by the transferred marking
compound, should have good contact all the way around.
7) Lap the valves into their seats, using a hand valve lapper
and lapping compound (commercially available).
To avoid severe engine damage, be sure to remove all
lapping compound from the cylinder head before
assembly.
8) Check valve clearance after assembly.
NOTICE